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Question
১ হতে ৯৯ পর্যন্ত সংখ্যাসমূহের যোগফল কত?
৪৬৫০
৪৭৫০
৪৮৫০
৪৯৫০
ANSWER : 4
Descrption
<p style="text-align:justify;">যোগফল = {(প্রথম সংখ্যা + শেষ সংখ্যা) × পদ সংখ্যা} ÷ ২</p><p style="text-align:justify;">= {(১ + ৯৯) × ৯৯}÷ ২</p><p style="text-align:justify;">= (১০০× ৯৯) ÷ ২</p><p style="text-align:justify;">= ৪৯৫০</p>
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